One more fix in the indexing

src/algorithms/contractions/ctmrg_contractions.jl

@@ -273,7 +273,7 @@ Apply bottom projector to southwest corner and south edge.
 function renormalize_bottom_corner((row, col), envs::CTMRGEnv, projectors)
     C_southwest = envs.corners[SOUTHWEST, row, _prev(col, end)]
     E_south = envs.edges[SOUTH, row, col]
-    P_bottom = projectors[1][_prev(row, end), col]
+    P_bottom = projectors[1][row, col]
     return @autoopt @tensor corner[χ_in; χ_out] :=
         E_south[χ_in D1 D2; χ1] * C_southwest[χ1; χ2] * P_bottom[χ2 D1 D2; χ_out]
 end
@@ -292,7 +292,7 @@ Apply top projector to northwest corner and north edge.
 function renormalize_top_corner((row, col), envs::CTMRGEnv, projectors)
     C_northwest = envs.corners[NORTHWEST, row, _prev(col, end)]
     E_north = envs.edges[NORTH, row, col]
-    P_top = projectors[2][row, col]
+    P_top = projectors[2][_next(row, end), col]
     return @autoopt @tensor corner[χ_in; χ_out] :=
         P_top[χ_in; χ1 D1 D2] * C_northwest[χ1; χ2] * E_north[χ2 D1 D2; χ_out]
 end